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/*
* Copyright (C) 2015-2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WEBGL)
#include "WebGLTransformFeedback.h"
#include "WebCoreOpaqueRootInlines.h"
#include "WebGL2RenderingContext.h"
#include "WebGLBuffer.h"
#include <JavaScriptCore/AbstractSlotVisitorInlines.h>
#include <wtf/Lock.h>
#include <wtf/Locker.h>
namespace WebCore {
RefPtr<WebGLTransformFeedback> WebGLTransformFeedback::create(WebGL2RenderingContext& context)
{
auto object = context.protectedGraphicsContextGL()->createTransformFeedback();
if (!object)
return nullptr;
return adoptRef(*new WebGLTransformFeedback { context, object });
}
WebGLTransformFeedback::~WebGLTransformFeedback()
{
if (!m_context)
return;
runDestructor();
}
WebGLTransformFeedback::WebGLTransformFeedback(WebGL2RenderingContext& context, PlatformGLObject object)
: WebGLObject(context, object)
{
m_boundIndexedTransformFeedbackBuffers.grow(context.maxTransformFeedbackSeparateAttribs());
}
void WebGLTransformFeedback::deleteObjectImpl(const AbstractLocker&, GraphicsContextGL* context3d, PlatformGLObject object)
{
context3d->deleteTransformFeedback(object);
}
void WebGLTransformFeedback::setProgram(const AbstractLocker&, WebGLProgram& program)
{
m_program = &program;
m_programLinkCount = program.getLinkCount();
}
void WebGLTransformFeedback::setBoundIndexedTransformFeedbackBuffer(const AbstractLocker&, GCGLuint index, WebGLBuffer* buffer)
{
ASSERT(index < m_boundIndexedTransformFeedbackBuffers.size());
m_boundIndexedTransformFeedbackBuffers[index] = buffer;
}
bool WebGLTransformFeedback::getBoundIndexedTransformFeedbackBuffer(GCGLuint index, WebGLBuffer** outBuffer)
{
if (index >= m_boundIndexedTransformFeedbackBuffers.size())
return false;
*outBuffer = m_boundIndexedTransformFeedbackBuffers[index].get();
return true;
}
bool WebGLTransformFeedback::hasEnoughBuffers(GCGLuint numRequired) const
{
if (numRequired > m_boundIndexedTransformFeedbackBuffers.size())
return false;
for (GCGLuint i = 0; i < numRequired; i++) {
if (!m_boundIndexedTransformFeedbackBuffers[i].get())
return false;
}
return true;
}
void WebGLTransformFeedback::addMembersToOpaqueRoots(const AbstractLocker& locker, JSC::AbstractSlotVisitor& visitor)
{
for (auto& buffer : m_boundIndexedTransformFeedbackBuffers)
addWebCoreOpaqueRoot(visitor, buffer.get());
addWebCoreOpaqueRoot(visitor, m_program.get());
if (m_program)
m_program->addMembersToOpaqueRoots(locker, visitor);
}
void WebGLTransformFeedback::unbindBuffer(const AbstractLocker&, WebGLBuffer& buffer)
{
for (auto& boundBuffer : m_boundIndexedTransformFeedbackBuffers) {
if (boundBuffer == &buffer)
boundBuffer = nullptr;
}
}
bool WebGLTransformFeedback::validateProgramForResume(WebGLProgram* program) const
{
return program && m_program == program && program->getLinkCount() == m_programLinkCount;
}
}
#endif // ENABLE(WEBGL)
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